As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCOMPLISHMENT OF CPCP CHECK INSPECTION, FOUND LEFT HAND WING INTERNAL STA 686.50 AFT STRINGER TO RIB ATTACH POINT DOUBLER IS CRACKED, MARKED M3 LOWER. REPAIRED IAW BOEING SRM 57-10-5 AND BSB 727-570127 FIGURE 2. CORROSION TASK CARD NUMBER C57-571-01. NON-ROUTINE TASK CARD NUMBER 106867.